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http://hdl.handle.net/1942/34160
Title: | Electron emission from H-terminated diamond enhanced by polypyrrole grafting | Authors: | Ukraintsev, Egor Kromka, Alexander JANSSEN, Wiebke HAENEN, Ken Takeuchi, Daisuke Babor, Petr Rezek, Bohuslav |
Issue Date: | 2021 | Publisher: | PERGAMON-ELSEVIER SCIENCE LTD | Source: | CARBON, 176 , p. 642 -649 | Abstract: | Electron emission plays an important role in diverse applications, from cold cathodes to chemical processes (solvated electrons, water purification), energy generation (thermionic or dye-sensitized solar cells), and even cancer treatment. Here we show that by surface treatment using electrochemically grown polypyrrole the secondary-electron emission and photoelectron emission from boron-doped diamond is enhanced even above the intensity of electron emission from the hydrogen-terminated surface with negative electron affinity. This enhancement is stable in air for at least one month and it persists also in vacuum after thermal annealing. Scanning electron microscopy, Kelvin probe force microscopy, total photoelectron yield spectroscopy as well as surface mapping by Auger and secondary ion mass spectroscopies are used to characterize and correlate the surface electronic and chemical properties. A model of the electron emission enhancement is provided. (C) 2020 Elsevier Ltd. All rights reserved. | Notes: | Ukraintsev, E (corresponding author), Czech Tech Univ, Fac Elect Engn, Tech 2, Prague 6 16627, Czech Republic. ukraiego@fel.cvut.cz |
Other: | Ukraintsev, E (corresponding author), Czech Tech Univ, Fac Elect Engn, Tech 2, Prague 6 16627, Czech Republic. ukraiego@fel.cvut.cz | Keywords: | mond;Surfaces;Electron emission;Electron affinity;Polypyrrole;Kelvin probe | Document URI: | http://hdl.handle.net/1942/34160 | ISSN: | 0008-6223 | e-ISSN: | 1873-3891 | DOI: | 10.1016/j.carbon.2020.12.043 | ISI #: | WOS:000630376700063 | Rights: | © 2020 Elsevier Ltd. All rights reserved. | Category: | A1 | Type: | Journal Contribution | Validations: | ecoom 2022 |
Appears in Collections: | Research publications |
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